TSI Incorporated 8525, Руководство по эксплуатации и обслуживанию

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Chapter 4
42
Chapter 3, “ Operation ,” for detailed instructions on performing the Daily
Zero Check.
Recharging the Alcohol Wick
The alcohol wick should be recharged with alcohol at least once a day
(depending upon usage). Please see Chapter 2, “
Setting Up ,” for detailed
instructions on recharging the alcohol wick.
Alcohol Cartridge
The alcohol cartridge holds a reservoir of isopropyl alcohol. A porous wick
inside the cartridge is soaked with alcohol. Because the alcohol cartridge
gets inserted into the cartridge cavity of the P-T
RAK
® particle counter, it is
critically important to keep it clean. Any dirt or debris that gets into the
P-T
RAK
® particle counter may plug the small internal nozzle and prevent
operation. Do not allow the black part of the alcohol cartridge to make
contact with any surface that may be dirty.
Note: Keep the storage cap and alcohol cartridge clean. Always set
them down with the end standing up.
Changing the Alcohol Wick
The wick and screen inside the alcohol cartridge may be changed in the
field. Two spare wicks and screens are included with the P-T
RAK
®
particle counter. Normally, the wick will not need to be changed unless
one of the following problems develops:
1. Moisture accumulates in the wick and causes the “Low Alcohol”
message to come on even when there is an adequate alcohol supply.
This may happen when the P-T
RAK
®
particle counter is used
extensively for long periods of time, especially in high humidity
areas.
2. The wick becomes contaminated with dirt, oil, or other foreign
substances. This does not normally happen. However, if the
instrument is used to sample particles other than those normally
found in ambient air (such as, boiler rooms, combustion aerosol)
the wick may become contaminated and need replacement.
3. The fine mesh screen inside the Alcohol Cartridge becomes
plugged with foreign material.
When moisture accumulation occurs, the alcohol wick can be removed,
allowed to dry, and then re-installed into the alcohol cartridge. If the
alcohol wick or screen is contaminated, it should be discarded and
replaced with a new one (if it is
not contaminated, it may be reused).